[Raven]

what about the timed released mode?
intermittent as they are ON
but not ON "continuously" because there's insufficient
raindrops to wipe off..... so you choose a timed response
and sometimes the DRIVER is the "INTERMITTENT switch
because the rubber blade is screeching instead of wiping.

Personally i keep a pair of inexpensive yellow shooting glasses handy
because it turns a rainy day visibility into a sunny day clear view day

ALSO, i treat my windshield with RAIN-X the day BEFORE it's going to RAIN
because this SILICON window glass treatment makes the raindrops RACE
up the windshield and fly off instead of them getting flattened out by wind
into an Omeba odd shape and hang around. Using RAIN X you don't see any
difference having the wipers on because it works so well.